condition mean min max ZT0-3 37.301439 37.301439 37.301439 ZT4-7 34.0558755 34.0558755 34.0558755 ZT8-11 39.056616500000004 39.056616500000004 39.056616500000004 ZT12-15 25.9878535 25.9878535 25.9878535 ZT16-19 29.4032505 29.4032505 29.4032505 ZT20-23 32.742912000000004 32.742912000000004 32.742912000000004